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Do I need a COVID-19 booster shot? 6 questions answered on how to stay protected

By William Petri, Professor of Medicine, University of Virginia
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The increasing prevalence of new coronavirus variants is raising questions about how well protected those who’ve already had their COVID-19 shots are against evolving forms of the SARS-CoV-2 virus. Here, microbiology and infectious disease specialist William Petri of the University of Virginia answers some common questions about COVID-19 booster shots.

1. What is a booster shot?


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